NASA is reporting that an explosion was sighted on the Moon's surface. Don't worry, there are no little green men involved. But there is something odd about this report.

The odds of it happening at any given moment are slim. But given plenty of time, the chances of a collision with a near-Earth object become astronomical. With one such object in particular, 99942 Apophis, the risk is high enough that people are starting to take notice.

Avian flu is still on the move among birds. The fear of a human-to-human communicable mutation has many concerned given the incredibly high fatality rate among the few recorded human cases. Though there is no vaccination available yet, is it possible that a cure for the dreaded avian flu is available at the nearest grocery store?

The Tyrannosaurus rex has long been the darling of science fiction dinosaurs and has one of the most well-known skeletal designs among extinct creatures. But while even the most casual dinosaur enthusiast can identify the T. rex, until recently its sex was not even discernable.

Though dinosaurs are most known for their traits shared with modern reptiles, it is their kinship with birds that has finally revealed the sex of the T. rex. To prepare for egg production, female birds develop a thick layer of medullary bone in their long bones, which acts as an extra source of eggshell calcium. So what about the T. rex?